46. Cohen, William J. Petition and Supplementary Information for the Annexation of Butterworth to the City of Newark. Newark, Del.: William J. Cohen, 1978.

46. Cohen, William J. Petition and Supplementary Information for the Annexation of Butterworth to the City of Newark. Newark, Del.: William J. Cohen, 1978., Box: 22. William J. Cohen papers, MSS 0468. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/191597 Accessed September 18, 2024.